<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>sessionStorage</title>
</head>

<body>
    <h2>sessionStorage</h2>
    <button onclick="saveData()">点我保存一个数据</button>
    <button onclick="readData()">点我读取一个数据</button>
    <button onclick="deleteData()">点我删除一个数据</button>
    <button onclick="deleteAllData()">点我删除所有数据</button>
    <script type="text/javascript">
        let p = { name: 'bugdr', age: 18 }
        function saveData() {
            sessionStorage.setItem('msg', 'hello')
            sessionStorage.setItem('person', JSON.stringify(p))
        }
        function readData() {
            console.log("readData", sessionStorage.getItem('msg'));
            const result = sessionStorage.getItem('person')
            console.log("readData", JSON.stringify(result));
        }
        function deleteData() {
            sessionStorage.removeItem('msg')
            const result = sessionStorage.removeItem('person')
            console.log("readData", result);
        }
        function deleteAllData() {
            sessionStorage.removeItem('msg')
            const result = sessionStorage.clear('person')
            console.log("readData", result);
        }
    </script>
</body>

</html>